NASA NTRS · 20080006888
Method for cleaning and passivating a metal surface
Abstract
A cleaning solvent useful in the cleaning of metal surfaces, e.g. nickle-iron alloys, contains sulfamic acid, citric acid, a solvent for hydrocarbon residues, and a surfactant. Metal surfaces are cleaned by contacting the surface with the cleaning solvent and then passivated by contact with aqueous solutions of citric acid or sodium nitrite or a combination of the two.
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Alexander, George B., Carpenter, Norman F.. 1976-05-18. Method for cleaning and passivating a metal surface. https://ntrs.nasa.gov/citations/20080006888
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